Nothappyjan,
I have worked with a lot of crew who hated it at first and some who loved it, hated it after 3 months and then love it again a month later, it seems to be quite common.
Why? I think everyone has this illusion of how glamourous it will be until they actually do it. We always joke the only glamorous part of the job is walking through the airport at the end of your shift! The job is really about safety and security, you are always working quickly, can work 10 hours with 5 minutes rest and without actually eating or sitting down (except for t/o and ldg), combined with 5 sector days or 8+ hours in the air, it takes a huge toll on your body and takes a considerbale amount of time to adjust to.
I've seen quite a few crew quit early, try to stick it out though, in a few months, once you've adjusted and have become more aware of how to live as a F/A you may very well love it.
Just a small comment though, I have no idea who you work for but could it also be the companies culture? Maybe you'd feel better off in a full service "professional" face airline rather then a discount one or visa versa.
Finally, talk to other crew, even tell your base manager/supervisor. You don't have to go through this alone, any decent airline is going to help you through it. They've made an investment in you because they think you will be/are a great asset to their company and they are going to do what they can to help make your work life happier.
Hope all works out!